Bearing



Dec. 13, 1927. 1 652 468 .1. P. CATLIN BEARING Filed Sept. 10.- 1923 Q Qw,

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Patents Dec. 13, lZ7.

llgtSZAtt i STATES PATljf -i li @FFHQF.

JOSEPH P. CATLIN, OF PLAINFIELD, NEW JERSEY, ASSIGNOR TO WOODNEVJSPAPER, MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OFVIRGINIA.

BEARING.

Application filed September 10, 1923.

This invention relates to the production of a hearing or support for ashaft or other element. The principal objectof the invention is toprovide a seating surface or hearing preferably for a shaft. or othermovable element without machining the parts of the frame or body inwhich the bearing or the like is supported and to avoid the use of metalof too high class all through the same.

Other objects and advantages of the inven tion will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 isan end view of a bearing for a shaft constructed in accordance with thisinvention. the shaft appearing in section;

Fig. 2 is a central sectional View of the same along the line 22 of Fig.1;

Fig. 8 is a View similar to Fig. 2, showing a modification;

.Figs. 4 and 5 are similar views showing other modifications;

Fig. 6 isa transverse sectional view of a bearing box in two parts alsoconstructed in accordance with this invention, and

Fig. 7 is a perspective view of the two inside bearing elementsseparated.

In the form shown in Figs. 1 and 2, I have provided'for the support ofthe shaft 10 in a bearing provided in a support or frame 11. This may bea machine frame or anything else in fact. This frame or support 11preferably is produced as usual of cast iron, but I do not cast it solidwhere the shaft is to pass through and then bore a hole for the shaftorbore it out and then finish the inside surfaces. Instead I place acore in the mold which will produce, when the iron casting 11 is'made,-a substantially cylindrical hole or passage all the way throughthe frame in this case and having clove-tailed recesses 12 or otherundercut depressions spaced around it at intervals. This reduces theamount of cast iron used for the frame 11 in the first place and theinside surface of this passage is not finished in any way. The sand andother adhering matters are merely snagged off and the recesses clearedout. This finishes the casting 11 and there is no machine work on it atthis point.

A bush 13 made of suitable bearing metal is made in a die casting moldor, if preferred, in the usual sand cast manner and finished in amachine tool, as is customary.

This bush is finished on its inner surface to Serial No. 861,927.

receive a shaft or stud 10 so that the latter may slide or rotate freelytherein. The outer surface of bush 13 need not necessarily be finishedbut may preferably be left as it comes from the sand mold or, it may befitted with fins 14 cast integrally therewith. T he method of fasteningbush 13 within the core hole in the casting 11 is as follows Bush 13 isplaced upon stud 10'and bot-h located centrally within the core holehereinbefore described. A quantity of molten metal of a grade inferiorand cheaper than that. from which bush 13 is made,is thereupon pouredinto the space between the interior of hole in casting 11 and theexterior of bush 13. This metal marked 15 on Figs. 2, 3, 4 and 5, flowsinto the interstices l2 and 16, anchoring itself therein and contractingagainst the rough surface of the exterior of bush 13 forming as it doesso, a perfect lock between these two members. The fins 14 shown in Figs.1, 2 and 4 perform the same functions as the rough exterior of bush 13and may be used whenever the material from which bush 13 is made is notinherently rou h. b

The purpose of forming the hearings in this manner is to enable shaft 10to be readily removed from the finished hole in the frame'll after thepouring operation. It is possible, of course, to insert shaft 10 into arough hole in casting 11 and pour a quan tity of bearing metal into thespace between them. This would produce a wall of bear ing metal of morethan the necessary thickness, thereby increasing the expense of saidoperation. In addition to this and what is more annoying, is thedifficulty of removing a shaft from a freshly made cast, due to thegripping action incident to the contraction in cooling, this difficultybeing aggravated by the fact that several such shafts may be placed in asingle frame, making the operation of removing same an extremely impracticable one. The manner of procedure described above, however,permits a bush which has been previously finished to fit shaft 10 sothat it may slide easily on it to be cast into the frame 11. Thus, allcontraction due to the cooling of metal 15 cannot pass beyond the wallsof bush 13 and no gripping is, therefore, felt by the shaft 10. Hence afinished hole is produced in frame 11 without necessitating undue effortin the removal of the shafts, with a minimum amount of the comparativelyhigh priced bearing metal being used in the operation.

In the form shown in Fig. 3, all conditions above mentioned are presentexcept that the bush 13 does not have any ribs 14. In that case a metalcan be used for the lin ing that contracts slightly on cooling so as tofirmly unite it with the bush 13 or the exterior of the bush 15 can beformed on an ordinary sand mold which will make it irregular enough tohold in the lining in many cases. Thus. the bush 13 will constitute abearing bushing and it will not turn with the shaft if the shaft isproperly lubricated.

In 4 and 5 the same principles above mentioned. are applied in a case inwhich the opening for the shaft does not extend all the way through theframe 11. In that case the body of metal or alloy 15 is provided with aflat end 17 against which the end of the shaft may hear if desired. Ihave shown this arranged both with and without fins 14.

In Figs. 6 and 7 the principles above mentioned. are applied to twosemi-cylindrical bearings 20. These are formed like the bushes 13 andare made of proper alloy for serving as bearing surfaces for a rotatingshaft.

Bearings 20 are held in a suitable jig or fixture which is in turnsupported by the bracket 22 so as to locate the position of bush 20 inthe desired relationship to the other surfaces of brackets 22. The softmetal 21 is thereupon poured between bush 20 and bracket 22 in a similarmanner to that described above, forming thereby, an effective anchor ormeans for locking the bush 20 in the desired position. Suitableanchorages provided 011 the outer surface of bush 20 marked 23 on Fig. 6and similar anchorages provided on the inner surface of bracket 22 formpockets into which the metal 21 is permitted to flow and congeal servingas a. means to hold the two parts together.

Although I have illustrated and described only a few forms of theinvention, I am aware of the fact that other modifications can be madetherein by any person skilled in. the art without departing from thescope of the invention as expressed in the claims. Therefore, I do notwish to be limited to any of the forms herein shown and described butwhat I do claim is 1. As an article of manufacture, a frame or supportprovided with an opening therein having a body of soft metal of acomposition suitable for bearings cast around a mandrel of the size ofthe shaft to be received, whereby it has an inner smooth bearing surfaceexactly fitting the shaft and located in said opening, and a body ofcomparatively coarse soft metal cast in the opening in the support orframe and around said bearing metal, the first named soft metal bodyhaving fins in its outer wall projecting into the second body of metalto hold the bearing metal permanently in place.

2. As an article of manufacture, a frame or support having a. passagewith depressions and projections cast therein in a rough state, a bodyof relatively soft bearing metal of a composition incapable of materialshrinkage in casting cast withits interior finished in the act ofcasting to the shape of the shaft to be carried by the bearing andlocated in said passage, and a body of metal east in said passa e andaround said bearing metal and. held fixedly by said projections anddepressions in said passage and provided on its inner surface withprojections and depressions therein for fitting said bearing metal bodyand fixedly holding the latter in position in said passage.

8. As an article of manufacture, a half bearing comprising a supportingpart or frame having a recess therein, and a body of bearing metalpermanently mounted inside the same of semi-circular shape with integraldiametrically opposite flanges finished on the concave and flat surfacesin the act of casting, and a bod of soft metal. per manently located insair recess around the bearing metal to support and hold the latter.

In testimony whereof I have hereunto affixed my signature.

JOSEPH P. CATLIN.

